feat: multiple improvements, additions, vibin'

functions/nvm_compat_detect.fish

@@ -0,0 +1,71 @@
+function nvm_compat_detect -d "Detect available Node.js version managers"
+    set -l managers
+
+    if command -q nvm
+        set managers $managers nvm
+    end
+
+    if command -q fnm
+        set managers $managers fnm
+    end
+
+    if command -q volta
+        set managers $managers volta
+    end
+
+    if command -q asdf; and test -f ~/.tool-versions
+        if grep -q nodejs ~/.tool-versions 2>/dev/null
+            set managers $managers asdf
+        end
+    end
+
+    if test (count $managers) -eq 0
+        echo "No supported Node.js version managers found"
+        return 1
+    end
+
+    echo "Available managers:" (string join ", " $managers)
+    echo $managers
+end
+
+function nvm_compat_use -a manager version -d "Use specified version with detected manager"
+    if test -z "$manager" -o -z "$version"
+        echo "Usage: nvm_compat_use <manager> <version>"
+        return 1
+    end
+
+    switch $manager
+        case nvm
+            nvm use $version
+        case fnm
+            fnm use $version
+        case volta
+            volta pin node@$version
+        case asdf
+            asdf local nodejs $version
+        case '*'
+            echo "Unsupported manager: $manager"
+            return 1
+    end
+end
+
+function nvm_compat_install -a manager version -d "Install specified version with detected manager"
+    if test -z "$manager" -o -z "$version"
+        echo "Usage: nvm_compat_install <manager> <version>"
+        return 1
+    end
+
+    switch $manager
+        case nvm
+            nvm install $version
+        case fnm
+            fnm install $version
+        case volta
+            volta install node@$version
+        case asdf
+            asdf install nodejs $version
+        case '*'
+            echo "Unsupported manager: $manager"
+            return 1
+    end
+end